package stone;

import java.util.List;

import stone.ast.ASTList;
import stone.ast.ASTree;

public class NegativeExpr extends ASTList {
	public NegativeExpr(List<ASTree> c) { super(c); }
	public ASTree operand() { return child(0); }
	public String toString() {
		return "-" + operand();
	}

}
